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Awada A, Lanoë PH, Philouze C, Loiseau F, Jouvenot D. Tuning the Coordination Environment of Ru(II) Complexes with a Tailored Acridine Ligand. Molecules 2024; 29:3468. [PMID: 39124873 PMCID: PMC11313782 DOI: 10.3390/molecules29153468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/12/2024] Open
Abstract
A novel tridentate ligand featuring an acridine core and pyrazole rings, namely 2,7- di-tert-butyl-4,5-di(pyrazol-1-yl)acridine, L, was designed and used to create two ruthenium(II) complexes: [RuL2](PF6)2 and [Ru(tpy)L](PF6)2. Surprisingly, the ligand adopted different coordination modes in the complexes: facial coordination for the homoleptic complex and meridional coordination for the heteroleptic complex. The electronic absorption and electrochemical properties were evaluated. Although both complexes exhibited favorable electronic properties for luminescence, neither emitted light at room temperature nor at 77 K. This study highlights the complex interplay between ligand design, coordination mode, and luminescence in ruthenium(II) complexes.
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Affiliation(s)
| | | | | | - Frédérique Loiseau
- Université Grenoble Alpes, CNRS, DCM, 38000 Grenoble, France; (A.A.); (P.-H.L.); (C.P.)
| | - Damien Jouvenot
- Université Grenoble Alpes, CNRS, DCM, 38000 Grenoble, France; (A.A.); (P.-H.L.); (C.P.)
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2
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Gonçalves MR, Frin KP. Synthesis, electrochemical and photochemical properties of neutral Ir(III) complex based on 3-Iodopyridine-2-carboxylate ligand. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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Bevernaegie R, Wehlin SAM, Piechota EJ, Abraham M, Philouze C, Meyer GJ, Elias B, Troian-Gautier L. Improved Visible Light Absorption of Potent Iridium(III) Photo-oxidants for Excited-State Electron Transfer Chemistry. J Am Chem Soc 2020; 142:2732-2737. [DOI: 10.1021/jacs.9b12108] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robin Bevernaegie
- UCLouvain, Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Sara A. M. Wehlin
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Eric J. Piechota
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Michael Abraham
- UCLouvain, Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Christian Philouze
- Département de Chimie Moléculaire, Université Grenoble-Alpes (UGA), UMR CNRS 5250, CS 40700, 38058 Grenoble, France
| | - Gerald J. Meyer
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Benjamin Elias
- UCLouvain, Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Ludovic Troian-Gautier
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
- Laboratoire de Chimie Organique, Université Libre de Bruxelles (ULB), CP 160/06, 50 avenue F.D. Roosevelt, B-1050 Brussels, Belgium
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4
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Bevernaegie R, Marcélis L, Laramée-Milette B, De Winter J, Robeyns K, Gerbaux P, Hanan GS, Elias B. Trifluoromethyl-Substituted Iridium(III) Complexes: From Photophysics to Photooxidation of a Biological Target. Inorg Chem 2018; 57:1356-1367. [PMID: 29336560 DOI: 10.1021/acs.inorgchem.7b02778] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Photodynamic therapeutic agents are of key interest in developing new strategies to develop more specific and efficient anticancer treatments. In comparison to classical chemotherapeutic agents, the activity of photodynamic therapeutic compounds can be finely controlled thanks to the light triggering of their photoreactivity. The development of type I photosensitizing agents, which do not rely on the production of ROS, is highly desirable. In this context, we developed new iridium(III) complexes which are able to photoreact with biomolecules; namely, our Ir(III) complexes can oxidize guanine residues under visible light irradiation. We report the synthesis and extensive photophysical characterization of four new Ir(III) complexes, [Ir(ppyCF3)2(N^N)]+ [ppyCF3 = 2-(3,5-bis(trifluoromethyl)phenyl)pyridine) and N^N = 2,2'-dipyridyl (bpy); 2-(pyridin-2-yl)pyrazine (pzpy); 2,2'-bipyrazine (bpz); 1,4,5,8-tetraazaphenanthrene (TAP)]. In addition to an extensive experimental and theoretical study of the photophysics of these complexes, we characterize their photoreactivity toward model redox-active targets and the relevant biological target, the guanine base. We demonstrate that photoinduced electron transfer takes place between the excited Ir(III) complex and guanine which leads to the formation of stable photoproducts, indicating that the targeted guanine is irreversibly damaged. These results pave the way to the elaboration of new type I photosensitizers for targeting cancerous cells.
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Affiliation(s)
- Robin Bevernaegie
- Université catholique de Louvain (UCL) , Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur, 1 box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Lionel Marcélis
- Université catholique de Louvain (UCL) , Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur, 1 box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Baptiste Laramée-Milette
- Département de Chimie, Université de Montréal , Pavillon J.-A. Bombardier, 5155 Chemin de la Rampe, Montréal, Québec H3T 2B1, Canada
| | - Julien De Winter
- Organic Synthesis and Mass Spectrometry Laboratory, University of Mons - UMons , 23 Place du Parc, B-7000 Mons, Belgium
| | - Koen Robeyns
- Université catholique de Louvain (UCL) , Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur, 1 box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Pascal Gerbaux
- Organic Synthesis and Mass Spectrometry Laboratory, University of Mons - UMons , 23 Place du Parc, B-7000 Mons, Belgium
| | - Garry S Hanan
- Département de Chimie, Université de Montréal , Pavillon J.-A. Bombardier, 5155 Chemin de la Rampe, Montréal, Québec H3T 2B1, Canada
| | - Benjamin Elias
- Université catholique de Louvain (UCL) , Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur, 1 box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
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5
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Bevernaegie R, Marcélis L, Moreno-Betancourt A, Laramée-Milette B, Hanan GS, Loiseau F, Sliwa M, Elias B. Ultrafast charge transfer excited state dynamics in trifluoromethyl-substituted iridium(iii) complexes. Phys Chem Chem Phys 2018; 20:27256-27260. [DOI: 10.1039/c8cp04265a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Ultrafast spectroscopic studies on the excited state interplay in trifluoromethyl-substituted iridium(iii) complexes.
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Affiliation(s)
- Robin Bevernaegie
- Université catholique de Louvain (UCL)
- Institut de la Matière Condensée et des Nanosciences (IMCN)
- B-1348 Louvain-la-Neuve
- Belgium
| | - Lionel Marcélis
- Université catholique de Louvain (UCL)
- Institut de la Matière Condensée et des Nanosciences (IMCN)
- B-1348 Louvain-la-Neuve
- Belgium
| | | | | | - Garry S. Hanan
- Département de Chimie
- Université de Montréal, Montréal
- Québec
- Canada
| | - Frédérique Loiseau
- Département de Chimie Moléculaire
- Université Grenoble-Alpes
- CNRS UMR 5250
- BP53 38041 Grenoble
- France
| | - Michel Sliwa
- Université de Lille
- CNRS
- UMR 8516
- LASIR
- Laboratoire de Spectrochimie Infrarouge et Raman
| | - Benjamin Elias
- Université catholique de Louvain (UCL)
- Institut de la Matière Condensée et des Nanosciences (IMCN)
- B-1348 Louvain-la-Neuve
- Belgium
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6
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Piraux G, Bar L, Abraham M, Lavergne T, Jamet H, Dejeu J, Marcélis L, Defrancq E, Elias B. New Ruthenium-Based Probes for Selective G-Quadruplex Targeting. Chemistry 2017; 23:11872-11880. [PMID: 28609545 DOI: 10.1002/chem.201702076] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Indexed: 01/13/2023]
Abstract
Telomeric regions containing G-quadruplex (G4) structures play a pivotal role in the development of cancers. The development of specific binders for G4s is thus of great interest in order to gain a deeper understanding of the role of these structures, and to ultimately develop new anticancer drug candidates. For several years, RuII complexes have been studied as efficient probes for DNA. Interest in these complexes stems mainly from the tunability of their structures and properties, and the possibility of using light excitation as a tool to probe their environment or to selectively trigger their reaction with a biological target. Herein, we report on the synthesis and thorough study of new RuII complexes based on a novel dipyrazino[2,3-a:2',3'-h]phenazine ligand (dph), obtained through a Chichibabin-like reaction. Luminescence experiments, surface plasmon resonance (SPR), and computational studies have demonstrated that these complexes behave as selective probes for G-quadruplex structures.
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Affiliation(s)
- Guillaume Piraux
- Institut de la Matière Condensée et des Nanosciences (IMCN)-Molécules, Solides et Réactivité (MOST), Université catholique de Louvain, Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
| | - Laure Bar
- Université Grenoble-Alpes, UMR CNRS 5250, 38000, Grenoble, France
| | - Michaël Abraham
- Institut de la Matière Condensée et des Nanosciences (IMCN)-Molécules, Solides et Réactivité (MOST), Université catholique de Louvain, Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
| | - Thomas Lavergne
- Université Grenoble-Alpes, UMR CNRS 5250, 38000, Grenoble, France
| | - Hélène Jamet
- Université Grenoble-Alpes, UMR CNRS 5250, 38000, Grenoble, France
| | - Jérôme Dejeu
- Université Grenoble-Alpes, UMR CNRS 5250, 38000, Grenoble, France
| | - Lionel Marcélis
- Institut de la Matière Condensée et des Nanosciences (IMCN)-Molécules, Solides et Réactivité (MOST), Université catholique de Louvain, Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
| | - Eric Defrancq
- Université Grenoble-Alpes, UMR CNRS 5250, 38000, Grenoble, France
| | - Benjamin Elias
- Institut de la Matière Condensée et des Nanosciences (IMCN)-Molécules, Solides et Réactivité (MOST), Université catholique de Louvain, Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
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7
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Passays J, Rubay C, Marcélis L, Elias B. Synthesis and Photophysical Properties of Triazolyl Ir
III
Nucleosides. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601227] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Johan Passays
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCL) Place Louis Pasteur 1/L4.01.02 1348 Louvain‐la‐Neuve Belgium
| | - Christophe Rubay
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCL) Place Louis Pasteur 1/L4.01.02 1348 Louvain‐la‐Neuve Belgium
| | - Lionel Marcélis
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCL) Place Louis Pasteur 1/L4.01.02 1348 Louvain‐la‐Neuve Belgium
| | - Benjamin Elias
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCL) Place Louis Pasteur 1/L4.01.02 1348 Louvain‐la‐Neuve Belgium
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